1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
// Copyright(c) 2019 ZVYAGIN.Alexander@gmail.com
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
#pragma once
#include <spdlog/sinks/base_sink.h>
#include <spdlog/details/null_mutex.h>
#include <spdlog/details/synchronous_factory.h>
#include <array>
#ifndef SD_JOURNAL_SUPPRESS_LOCATION
#define SD_JOURNAL_SUPPRESS_LOCATION
#endif
#include <systemd/sd-journal.h>
namespace spdlog {
namespace sinks {
/**
* Sink that write to systemd journal using the `sd_journal_send()` library call.
*
* Locking is not needed, as `sd_journal_send()` itself is thread-safe.
*/
template<typename Mutex>
class systemd_sink : public base_sink<Mutex>
{
public:
//
systemd_sink()
: syslog_levels_{{/* spdlog::level::trace */ LOG_DEBUG,
/* spdlog::level::debug */ LOG_DEBUG,
/* spdlog::level::info */ LOG_INFO,
/* spdlog::level::warn */ LOG_WARNING,
/* spdlog::level::err */ LOG_ERR,
/* spdlog::level::critical */ LOG_CRIT,
/* spdlog::level::off */ LOG_INFO}}
{}
~systemd_sink() override {}
systemd_sink(const systemd_sink &) = delete;
systemd_sink &operator=(const systemd_sink &) = delete;
protected:
using levels_array = std::array<int, 7>;
levels_array syslog_levels_;
void sink_it_(const details::log_msg &msg) override
{
int err;
size_t length = msg.payload.size();
// limit to max int
if (length > static_cast<size_t>(std::numeric_limits<int>::max()))
{
length = static_cast<size_t>(std::numeric_limits<int>::max());
}
// Do not send source location if not available
if (msg.source.empty())
{
// Note: function call inside '()' to avoid macro expansion
err = (sd_journal_send)("MESSAGE=%.*s", static_cast<int>(length), msg.payload.data(), "PRIORITY=%d", syslog_level(msg.level),
"SYSLOG_IDENTIFIER=%.*s", static_cast<int>(msg.logger_name.size()), msg.logger_name.data(), nullptr);
}
else
{
err = (sd_journal_send)("MESSAGE=%.*s", static_cast<int>(length), msg.payload.data(), "PRIORITY=%d", syslog_level(msg.level),
"SYSLOG_IDENTIFIER=%.*s", static_cast<int>(msg.logger_name.size()), msg.logger_name.data(), "CODE_FILE=%s",
msg.source.filename, "CODE_LINE=%d", msg.source.line, "CODE_FUNC=%s", msg.source.funcname, nullptr);
}
if (err)
{
throw_spdlog_ex("Failed writing to systemd", errno);
}
}
int syslog_level(level::level_enum l)
{
return syslog_levels_.at(static_cast<levels_array::size_type>(l));
}
void flush_() override {}
};
using systemd_sink_mt = systemd_sink<std::mutex>;
using systemd_sink_st = systemd_sink<details::null_mutex>;
} // namespace sinks
// Create and register a syslog logger
template<typename Factory = spdlog::synchronous_factory>
inline std::shared_ptr<logger> systemd_logger_mt(const std::string &logger_name)
{
return Factory::template create<sinks::systemd_sink_mt>(logger_name);
}
template<typename Factory = spdlog::synchronous_factory>
inline std::shared_ptr<logger> systemd_logger_st(const std::string &logger_name)
{
return Factory::template create<sinks::systemd_sink_st>(logger_name);
}
} // namespace spdlog
|
